Book excerpt: The Tai Languages of Assam - a grammar and texts presents a comprehensive linguistic analysis of two endangered Tai languages of Assam, Aiton and Phake, together with information about Tai Khamyang, a highly endangered variety. This book presents chapters on phonology, syntax, lexicography and the writing system, as well as discussing earlier recorded data on the Tai languages in detail. Together with the book, there is a CD version of the linguistic analysis, linked to text files, sound files and photographs. Every language example is linked to a sound file, and to a document file containing a full transcription of the text from which that example has come. The comprehensive nature of this linking between the grammatical analysis and the primary data allows linguists, other scholars and members of the Tai community to check any of the claims made in the analysis. This innovative combination of book and CD therefore represents both a grammatical description in the best traditions of linguistics as well as a substantial documentation of the Tai languages. In the CD version, an electronic appendix presents a rich corpus of texts, from a wide range of styles and genres, together with documents presenting a transcription, translation and thoroughly annotated analysis for each of the texts presented.